humorous
if you tell someone, especially a child, about the birds and the bees, you tell them about sex.
My parents never actually sat down and told me about the birds and the bees.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。